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An Overview and Evaluation of Recent Machine Learning Imputation Methods Using Cardiac Imaging Data |pdf=|usr=}}{{28243594}} gab.com Text An Overview and Evaluation of Recent Machine Learning Imputation Methods Using Cardiac Imaging Data JO: Data (Basel) http://www.kidney.de/pget.php?&tw=1&pmid=28243594 #FOAvip Many clinical research datasets have a large percentage of missing values that directly impacts their usefulness in yielding high accuracy classifiers when used for training in supervised machine learning. While missing value imputation methods have been shown to work well with smaller percentages of missing values, their ability to impute sparse clinical research data can be problem specific. We previously attempted to learn quantitative guidelines for ordering cardiac magnetic resonance imaging during the evaluation for pediatric cardiomyopathy, but missing data significantly reduced our usable sample size. In this work, we sought to determine if increasing the usable sample size through imputation would allow us to learn better guidelines. We first review several machine learning methods for estimating missing data. Then, we apply four popular methods (mean imputation, decision tree, k-nearest neighbors, and self-organizing maps) to a clinical research dataset of pediatric patients undergoing evaluation for cardiomyopathy. Using Bayesian Rule Learning (BRL) to learn ruleset models, we compared the performance of imputation-augmented models versus unaugmented models. We found that all four imputation-augmented models performed similarly to unaugmented models. While imputation did not improve performance, it did provide evidence for the robustness of our learned models. Twit Text FOAVip An Overview and Evaluation of Recent Machine Learning Imputation Methods Using Cardiac Imaging Data ????Data (Basel) http://www.kidney.de/pget.php?&tw=1&pmid=28243594 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=28243594 #FOAvip English Wikipedia <ref>{{Cite pmid|28243594}}</ref> An Overview and Evaluation of Recent Machine Learning Imputation Methods Using Cardiac Imaging Data #MMPMID28243594 Liu Y; Gopalakrishnan V Data (Basel) 2017[Mar]; 2 (1): ä PMID28243594show ga Many clinical research datasets have a large percentage of missing values that directly impacts their usefulness in yielding high accuracy classifiers when used for training in supervised machine learning. While missing value imputation methods have been shown to work well with smaller percentages of missing values, their ability to impute sparse clinical research data can be problem specific. We previously attempted to learn quantitative guidelines for ordering cardiac magnetic resonance imaging during the evaluation for pediatric cardiomyopathy, but missing data significantly reduced our usable sample size. In this work, we sought to determine if increasing the usable sample size through imputation would allow us to learn better guidelines. We first review several machine learning methods for estimating missing data. Then, we apply four popular methods (mean imputation, decision tree, k-nearest neighbors, and self-organizing maps) to a clinical research dataset of pediatric patients undergoing evaluation for cardiomyopathy. Using Bayesian Rule Learning (BRL) to learn ruleset models, we compared the performance of imputation-augmented models versus unaugmented models. We found that all four imputation-augmented models performed similarly to unaugmented models. While imputation did not improve performance, it did provide evidence for the robustness of our learned models. äAn Overview and Evaluation of Recent Machine Learning Imputation Metho(epmc).pdf DeepDyve Pubget Overpricing